Phonograph-reproducer



D. H., WILSON. PHONOGRAPH REPRODUCER.

ArPLlcmoN m2o JuLY 8.1920.

12,390,963, Patentedsepn 13,1921.y

N 'l- N /z l UNITED A STATES PAT ENT OFFICE.

DAVID n. WILsoN,oF PHILADEIJ'HIA, PENNSYLVANIA.

" rHoNoGRAPHnEPnoDUcEa. i

Specification ofiLetterls Patent. i Sept. 13, 1921.

Application led July 8, 1920; Serial No. 394,730.

To all whom z't may concern.

Be it known that I, DAVID H. `VVILsoN, a citizen of the United States of America, residing at 6031 Trinit street, in the county of Philadelphia and tate of Pennsylvania,A

have invented certain new and useful Improvements in Phonograph-Reproducers, of which the following is a specification.

This invention relates to phonographs, and has special reference to reproducers for such instruments.

One important object of the invention is to improve and simphfy the phonograph reproducer disclosed in my copending application bearing the Serial No. 385,800 and tiled on the 1st day of June, 1920.

A second important object of the invention is to effect the improvement above mentioned while retaining the characteristic spaced point support for the sound box within the casing.

With the above and other objects in view, as will be hereinafter apparent, the invention consists in general of certain novel arrangements of details and combinations of parts hereinafter fully described, illustrated in the accompanying drawings and specifically claimed.

In the accompanying drawings like characters of reference indlcate like parts in the several views, and

Figure 1 is an enlarged perspective view of a reproducer constructed in accordance with this invention, the reproducer bei-ng cut diametrically in half to show the interior thereof.

Fig. 2 is an enlarged detail section taken radiall through one edge of the reproducer with t e parts disassembled.

Fig. 3 is a view similar to Fig. 2 but with the parts assembled.

In the form of the invention herein illus trated, the same being typical of the various forms the invention ma assume, there is provided a plate 10 formlng the back of the sound box and having its edges threaded. This plate is provided with a centrally disposed nipple 1l which projects rearwardly to fit over the neck 12 of a phonograph horn the body of the latter not being shown).

crewed onto this plate is a ring 13 which is L-shaped in cross section and forms the side and front of the sound box, the central part of the latter bein left open as shown so as to expose the diapIn-agm 14 which is peripherally supported 1n the box by the hol- `in Fig. v1:

low'elastic` rings 15` whichare formed of rubber tubing.

so proportioned that, when elastic rings Surrounding this sound box is a casing or housing consisting of a back member 16 havingr a centrally disposed opening 17 wherethrough the nipple 11 passes freely so that the two do not contact. Projecting from the front face of this plate adjacent its periphery is an annular flange 18 threaded on its outer surface and fitting neatly around. the ring 13 as shown. Screwed onthe flange 18 is a ring 19 which is L-shaped in cross section so that the central part of the front of the housing is open.

In order to hold the casing or housing in position and yet have the same sufficiently sion of vibrations to the casing and thus interfere with proper tone production certain novel means are employed whereby the two parts are connected, or rather supported relative to each other, at spaced pointsA The means employed in the present instance consist of an annularly arranged series of projections here shown as set screws 20 threaded through the back member 16 and similarl f arranged and spaced projections such as the screws 21 threaded through the liange of the member 19, the screws of one series being axially alined with the screws of the other series by preference` While here shown as screws it is obvious that integral or other fixed projections may be used for this purpose. It will now be obvious that the sound box proper is supported within the casing by projections from that casing on opposite sides of the sound box and at spaced intervals. Thus the sound box has great freedom from the casing and may vibrate without such vibrations being damped by direct contact with such casing.

There has been provided a simple and efficient device of the kind described and for the urpose specified.

aving thus described the invention, what is claimed as new, is

1. In a phonograph reproducer, a sound box, a casing surrounding the back and front peripheral portions of the sound box, and spaced projections carried by and extending inwardly from the casing, said projections engaging the sound box at spaced intervals adjacent its periphery.

2. Ina phonograph reproducer, a sound boX, a casing surrounding the back and front peripheral portions ofthe sound box, and annular serles of spaced projections carried ,by the Jfront and back portions of the casing and projecting inwardly from said casing, said projections engaging the sound box at spaced intervals adjacent its periphery.

3. In a phonograph reproducer, a sound box, a caslng surrounding the back and Wardly from said casing, said projections engaging the sound box at spaced intervals adjacent its periphery.

I. In a phonograph reproducer, a sound box, a casing surrounding the front and back portions of the sound box adjacent its periphery, and set screws projecting through the front and back portions of the casing and engaging the sound box at spaced intervals adjacent its periphery.

AIn testimony whereof I have hereunto affixed my signature.

DAVID II. WILSON. 

